The episode begins with a host setting the atmosphere for a spine-chilling story, highlighting the cold weather outside and inviting listeners to prepare for a tale titled "Devilstone." This narrative unfolds in Dublin, where the protagonist, Timothy Martin, leads a comfortable life thanks to a substantial inheritance. However, his tranquil existence is disrupted when he inherits an abandoned property in County Fermanagh, known as Devilstone, from a forgotten uncle.

Timothy's initial reaction is nonchalant; he considers renting the property out but is met with a skeptical response from his solicitor, Ian Carney. Carney strangely advises against renting it to prospective tenants, raising curiosity and concern. Shortly after, a visitor named Mr. Stoker arrives, furious about having visited Devilstone with his wife. Stoker claims that the house is haunted, which Timothy dismisses as absurd, thinking it's merely an excuse to avoid the rental.

Despite Everts, Timothy’s loyal manservant, suggesting the hauntings might have a foundation, Timothy is determined to investigate Devilstone for himself. They travel to the estate, encountering an imposing, gloomy mansion that unsettles both of them and their dog, Kim. As they explore the property, strange occurrences and eerie sounds begin to surface, raising the tension.

The narrative escalates with Timothy feeling someone's presence, witnessing strange footprints appearing in the mud, and experiencing physical manifestations of terror. Undeterred, he pushes forward, wanting to investigate further despite the creeping fear. However, they soon find themselves trapped in a room as doors mysteriously close, and a chilling voice ominously warns them of impending danger. The ghostly figure of Jason O'Flynn, Timothy's ancestor who had died tragically on the very grounds, appears, confirming that the house is indeed haunted.

The suspense builds as Timothy learns about the tragic backstory of Jason O'Flynn, who cursed the place after the demise of his wife. This curse has seemingly trapped his spirit within the house, and the connection to the recent events becomes clear. Timothy resolves to uncover more about the mystery shrouding the estate.

The investigation moves forward, but the discoveries lead to a climactic moment when Timothy and Everts uncover a trapdoor concealing the preserved body of Jason O'Flynn himself. This revelation ultimately leads to the lifting of the curse, allowing the ghost to finally rest in peace. The episode closes with a sense of foreboding yet comfort, as the host reflects on the themes of fear and gratitude, urging listeners to find solace in their lives as they drift off to sleep.

Overall, the episode is a rich blend of suspense, historical intrigue, and supernatural elements, examining themes of legacy, fear, and confronting the unknown. With careful narrative pacing and intriguing character development, it culminates in a resolved mystery that lingers in the mind of the audience.